System of ventilation



A. w. STEWART.

SYSTEM OF VENTILATION.

APPLICATION FILED NOV. 20, 1911.

1,391,217; PatentedSept. 20,1921. I

f/ a 6 m 1/ 5 mmmwgwz UNITED STATES ALEXANDER WILLIAM STEWART, OF GLASGOW, SCOTLAND.

SYSTEM OF VENTILATION.

Specification of Letters Patent.

Patented Sept. 20, 1921.

Application filed November 20, 1917. Serial No. 202,945.

To all whom it may concern:

Be it known that I, ALEXANDER WILLIAM STEWART, a subject of the King of the United Kingdom of Great Britain and Ireland, and residing at Glasgow, Scotland, have invented a certain new and useful Improvement in Systems of Vent1lat1on, of which the following is a specification.

This invention relates to an improved system of ventilation, and more particularly to a system of ventilation of shlps, and has for its primary object to provide an eflicient arrangement which effects the supply of fresh air to one or more points and also effects the discharge of foul air from the same or other points. V

The figure of the accompanying drawing illustrates diagrammatically by way of example one arrangement according to the invention.

The arrangement shown comprises a fan 1 (or several fans) of which the intake side is open to the atmosphere and the discharge side is connected to piping 2 from WlIICh 1s taken a branch 3 terminating in an inwardly directed nozzle 4: fitted in an air inductor 5, and a branch 6 terminating in an out wardly directed nozzle? fitted in an air eductor 8, the inductor 5 servlng for induction of a. supplemental supply of fresh air to the compartment 9, and the eductor 8 serving for discharge of foul alr from the compartment 10.

The inductor and the eductor are each constructed as a double truncated cone approximately located in the plane of truncation of which is a nozzle (4 or 7) disposed coaxially with the relative cone, through V which nozzle air discharged from the fan is ejected whereby a supplemental volume of airfresh air or foul air-is induced to flow in the one case through the lnductor 5 and in the other case through the eductor 8, i. 6., to the compartment 9 from the atmosphere and from the compartment 10 to the atmosphere.

As shown, the plplng 2 has openings 11 into the compartment 9 and openings 12 1nto the compartment 10. 13 denotes an outlet for discharge of foul air from the compartment 9.

lVith the use of an air inductor andeductor as above described, a large quantity of foul or fresh air can be moved with a much smaller expenditure of energy than required.

by the usual arrangements for direct supply or suction by means of a fan or fans connected to long ranges of trunking for movement of the entire volume of foul or fresh air through the trunking and fan or fans to or from the atmosphere.

For example, the volume of fresh air acted on directly and delivered by the fan into the compartment 9, plus the volume flowing into the compartment 9 by way of the inductor, represents a capacity for delivery of fresh air exceeding what may be effected with any other system even when otherwise efiicient apparatus is employed.

What I claim is v In combination, two compartments, an air inductorfitted to one compartment, an air eductor fitted to the other compartment, the inductor and the eductor each affording communication between the relative compart mentand the space exterior to said compartment, the inductor and the eductor each formed as a double truncated cone, a nozzle in the inductor, said nozzle directed toward 7 the first named compartment and located approximately in the plane of truncation of the inductor, a nozzle in the eductor, said second named nozzle directed away from the second named compartment and located approximately in the plane of truncation of the eductor, a fan having its intake exterior to saidcompartments, piping connected to the discharge side of said fan, and branches from said piping to said nozzles.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALEXANDER WILLIAM STEWART.

Witnesses: I

HENRY MASON, FLORENCE HOUSTON. 

